A ghostly pair of PN candidates in Lyra - Strottner/Drechsler 119/120 (Jon Talbot)

A ghostly pair of PN candidates in Lyra - Strottner/Drechsler 119/120

Link: https://www.starscapeimaging.com/StDr119_120/StDr119_120.html

Discovered by Xavier Strottner and Marcel Drechsler in Oct 2020, Strottner/Drechsler 119 and 120 (StDr119/120) are planetary nebula candidates in the constellation Lyra. I believe this is the first amateur image of both of them. They also are cataloged as PNG 067.4+15.7 and PNG 067.9+14.6 respectively. Both are very faint and relatively close to each other. Both were barely visible in 15hrs worth of HII data but were the brightest emission areas within the image. StDr 119 is the brighter nebulosity in the upper right side of the image and StDr 120 the brighter curved area in the upper left side of the image. There also seems to be some very faint ISM ionized emission also in other areas of the image. In the OIII band nearly no signal was seen in 19.3 hrs of exposure time. In the full resolution crops, available on the web link above, the center coordinates of both objects is shown with green hatch marks. StDr 119 looks like a very diffuse area of emission nebulosity. StDr 120 has a curved structure above where the center coordinates are. Near the center of these hatch marks are what looks like very faint blue white dwarf stars probably close to magnitude 17-18. I suppose it's possible that these stars are the ones responsible for both these objects. I would expect professional spectra to determine the real nature of these two objects.

Near the bottom of the image are two bright stars with nicely contrasting colors. The orange one is Delta 2 Lyrae. It lies some 880 light years distant and shines at magnitude 4.3. It has the luminosity of 6500 suns and is around 200 times larger in diameter than the sun. It's a red giant with a temperature of 3640 K which is cooler than the sun. Delta 1 Lyrae is a magnitude 5.57 blue main sequence star with a temperature of 18000 K. It's roughly 32 million years old and it shines with nearly 3000 times the luminosity of the sun. Delta 1 Lyrae is roughly1080 light years distant.

The image was taken from my home observatory during late March into early June 2022 and is composed of 42.5hrs of exposure time.

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Title: Annotated Version

Description: Annotated Version showing StDr119 and 120

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